Apparatus for manufacturing seamless tubing.



No. 719,231. A PATENTED JAN. 27, 1903. J. H. KING & B. M. WOLFE. APPARATUS I'OR MANUFACTURING SEAMLESS TUBING.

APPLICATION FILED DBO. 26, 1901.

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No. 719,231. PATENTBD JAN. 27, 1903.

l J. -H. KING & E. M WOLFE. APPARATUS POR MANUFACTURING SEAMLESS TUBING.

APPLIUATION FILED DEO. 26, 1901.

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JOHN ll. lllllG AND EDVAED4 llil. VOLFE, OF BEAVERFALLS, PENNSYL- VANlA, ASSIGNORS OF ONE-THIRD TO GEORGE H. BLAX'IER, OF

PlTTSBUltG, PENNSYLVANIA.

forming part of Letters Patent No. 719,231, dated January 27, 1903.

Application filed December 26,1901. Serial No. 87,362. (No model.)

To rtf/Z whom, 22:15 nL-rry/ concern:

Be it known that we, JOHN ll. KING and ED- WARD MOLFEmitizens of the United States, residing at Beaverfalls, in the county of Beaver and State or" Pennsylvania, have invented certain new and useful improvements in Afipparatus for Manufacturing Seamless Tubing, of which the 'following is a specification, reference being had therein to the accompanying drawings, forming part of this specidcation, in whiel1 Figure 1 a view in side elevation of our improved apparatus for manufacturing tubes, showing 'the bar advanced. Fig. 2 is a similar view showing 'the bar withdrawn. Fig. 3 is a similar view showing the operation of stripping the tube from the bar. Fig. Ll is a partial similar view, on an enlarged scale, illustrating' the detachment of the point. Fig. 5 is a cross-sectional view on the line VV of Fig. 1. Fig. G is a similar View on the line Vl Vl of Fig. 1. Fig. 7 is a similar View on the line V11 V11 ol Fig. 1. Fig. S is a partial view in side elevation, partly broken away, showing the cable connections for operating the thrust-bearing. Fig. i) is a plan view of Fig. 8. Fig. 10 is a longitudinal sectional view through the tln'nst-bearing, illustrating its construction and also showing the connection with the actuating-cables.

Our invention relates to the manufacture of seamless tubes; and it consists in the means 'for advancing and withdrawing the bar carrying the' piercing-point over which the tubeV is formed, means lor stripping the iinished tube, disengagingit from the table, and for the adjustment and location of the bar, together with other details of construction, as shall be more fully hereinafter set forth.

Referring to the drawings 2 Vis a longitudiing 7 and provided with a laterally-extending bar 8, by which the trough and tube may be thrown to one side and the tube discharged from the table upon skids or other suitable supporting apparatus.

D is the usual pressure-bar, upon the outer end of which is placed the piercing-point 10, the bar being connected at its rear end, as shown, with the traveling adjustable thrustbearing 11. The connection of the bar with the thrust-bearing is best illustrated in Fig. 10, the rear end of the bar being slotted, as shown, and adapted to move freely with relation to its connections and to bear backwardly through the intervening rotatingspindle 12 against adjusting-screw 13, by which the bar may be set forward to the exact position desired with relation to the working faces of the disks. I

Immediately in advance of the thrust-bearing is an abutment 14, through an openingin which the bar passes, but which abutment, however, limits the back travel of the tube and strips it off the bar during its back progress, as clearly illustrated in Fig. 3.

The thrust-bearingllis mounted, by means of slides 15, in the slideways 11, in which it is free to travel forward and back, and such travel is imparted to it through cables connected to the center frame of the thrust-bearing, as is best seen in Figs. 8 and 10. The cable 16 is attached at 17, passes forwardly around a grooved wheel 18, mounted in bearing 19 upon the under portion of the table, the cable then passing back over a grooved sheave-wheel 20, also pivotally mounted in suitable bearings, the other end of the cable 4 being attached to a counterweight 21, adapted to rise and fall in a pit 22 and at all times maintaining a tension and forward pull upon the thrust-bearing. Backward travel of the thrust-bearing is caused by means of cable 23, similarly connected at 2li to the thrustbearing, the cable passing backwardly around sheave 25, mounted at the outer end of the trame, then forwardly around a similar wheel 26, pivotally mounted in bearings 27 underneath the table, then around a traveling pulley-wheel 28, carried upon the outer end of a piston-rod 29 of a duid-actuated cylinder 30.

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Several of such wheels 26 and 28 may be provided, and the cable may be passed one or more times around such wheels 26 and 28 and then secured to any suitable point in the frame, as at 3l. By passing the cable as many times as desired around these wheels it will be seen that the leverage upon the thrust-bearing may be multiplied two or more times, according to the work in view.

The cylinder 30 is preferably double-acting to assist the counterweight and may be operated by a valve located at any convenient point to admit pressure to cause outward travel of the sheave-wheels 28, as in Fig. 2, and similar movement of the thrust-bearing 1l, the return movement being accomplished by means of the weight 21 and cable 16. Mounted upon the sides of the table, on one side in any convenient position, is a rack-bar provided with teeth 32, in which the paw133 will engage at any desired position, so as to lock the thrust-bearing in order to maintain the point-10 against pressure of the oncoming blank. The pawl 33 is pivotally mounted to the side of the thrust-bearing at 34, and connected with it is an upwardly-extending lever-arm 35, by which it may be thrown out of engagement, and when so thrown out of engagement, as indicated in dotted lines in Fig. S, the weight of the lever will hold the pawl out of engagement with the teeth of the rack-bar to permit backward travel of the thrust-bearing. The range of adjustment of the screw 18 being somewhat greater than the pitch of teeth 32, it will be seen that the bar can be set independent of the pitch ot' the teeth and that having been so arranged it is only necessary to bring` the thrust-bearing forward to its proper position and then throw the pawl into engagement and supply sufiicient back pressure to it in order to maiutain the point in proper position for work. The tube having been formed, the pawl is thrown up, as indicated in Figs. 2 and 3, pressure is supplied to cylinderO, and the bar is withdraw-n to its full limit, during which backward movement the tube 36 comes into contact with the abutment 111, first stripping off the ball 10, as indicated in Fig. 4, and then stripping the tube by further backward travel until it is entirely free, when it may be discharged from the table by lifting the lever 8 and tipping the trough-section 6. The point l0 having been replaced, the bar may then be advanced by releasing pressure from the cylinder and applying pressure to the other side of the piston, thus assisting the counterweight, the outer end of the bar being supported in the trough, when the operation mav be again repeated. u

The whole construction is positive, simple, and compact. The operation is rendered easy and dispenses with manual labor very largely, While rendering the manipulation of the bar and tube comparatively easy andinsuring the positive alinement and adjustment of the various parts independent of any especial skill.

The advantages of this construction will be appreciated by all those familiar with the operation of making seamless tubing, and the mechanism may be adapted to the manufacture of any size of tubes which may be made from a hollow billet..

Various changes and modifications may be made by the skilled mechanic in the design, proportions, or other details, according to special conditions, without departing from the invention, since we do not desire to be limited to the exact construction shown and described, but to include all such as within the scope of the following claims.

W'hat we claim is- 1. In combination with reducing-rolls, a table provided with a longitudinally-movable thrust-bearing provided with means for locking it against pressure of the mandrel at varying positions on the table, a mandrel connected with the thrust-bearing provided with a piercingpoint, means for adjusting the mandrel independent of the thrust-bearing, and means for imparting forward and back travel to the thrust-bearing.

' 2. In combination with reducing-rolls, a table provided with longitudinal supportingtroughs, a thrust-bearing adapted to travel forward and back upon the table provided with means for locking it against pressure of the mandrel at varyin g positions on the table, a mandrel connected with the thrust-bearing provided with a piercing-point, means for adjusting the mandrel independent of the thrust-bearing, and means for imparting forward and back travel to the thrust-bearing.

3. In combination with reducing-rolls, a tableprovided with longitudinal supportingtroughs, a thrust-bearing adapted to travel forward and back upon the table provided with means for locking it against pressure of the mandrel at varying positions on the table, a mandrel connected with the thrustbearing provided with a piercing-point, means for adjusting the mandrel independent of the thrust-bearing, flexible connections attached to the thrust-bearing passing in opposite directions aro und guiding-sheaves and connected with means for transmitting movement to the thrust-bearing in either direction.

4. In combination with reducing-rolls, a table provided with longitudinal supportingtroughs, a thrust-bearing adapted to travel forward and back upon the 'table provided with means for lockingit against pressure of the mandrel at varying positions on the table, a mandrel connected with the thrustbearing provided with a piercing-point, means for adjusting the mandrel independent of the thrust-bearing, flexible connections attached to the thrust bearing passing forwardly around a guiding-sheave and provided with a terminal counterweight, a `flexible connection attached to the thrust-bearing passing backwardly and around guiding-sheaves, and a fluid-actuated element adapted to exert pulling pressure upon said connection.

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5. In combination withredueing-ro11s,a table provided with longitudinal supportingtroughs, a thrust-hearing adapted to travel forward and back upon the table, a mandrel mounted therein provided with a terminal point, means for transmitting movement to the thrust-bearing in either direction, a locking-pawl mounted in the thrust-bearing adapted to engage teeth in the table, and means for adjusting the mand rel with relation to the thrust-bearing.

6. A table provided with longitudinal slide- Ways, rigid and tipping troughs mounted therein, a thrust-hearing slidingly mounted upon the table, a mandrel connected therewith and provided with a terminal point, a limiting-abutment for the tube and means for imparting forward and back movement to the thrust-hearing.

7. A table provided with longitudinal slide- Ways, rigid and tipping troughs mounted therein, a thrust-bearing slidingly mounted upon the table, a mandrel connected therewith and provided with a terminal point, a limiting-abutment for the tube, and means for imparting forward and back movement to the thrust-bearing, and means for locking the thrust-bearing in the table.

8. A table provided withlongitudiual slide- Ways, rigid and tipping troughs, mounted therein, a slidingly-mounted thrust-bearing provided with a connected mandrel having a terminal point, means for adjusting the bar, means for locking the thrust-bearing upon the table, and means for imparting movement to it in either direction.

In testimony whereof We afix our signatures in presence of tWo Witnesses.

JOHN H. KING. EDWARD M. WOLFE. 

